Image forming apparatus, process cartridge, and image forming method
An image and equipment technology, applied in the field of image forming equipment, process cartridges and image forming, can solve problems such as image defects and insufficient effect, and achieve the effect of good image
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[0434] Hereinafter, although this invention is demonstrated more concretely using manufacture example and an Example, these examples do not limit this invention at all. It should be noted that the parts in the following formulations all represent parts by mass.
[0435] (Production of charging roller)
[0436]
[0437] The types and amounts of the respective materials shown in Table 1 below were mixed to prepare unvulcanized rubber compositions.
[0438] Table 1
[0439]
[0440]
[0441] A round bar with a total length of 252 mm and an outer diameter of 6 mm, which was subjected to electroless nickel plating on the surface of free-cutting steel, was prepared. Next, an adhesive was applied over the entire circumference of the round rod in a range of 230 mm except for 11 mm at both ends. As the adhesive, a conductive hot-melt adhesive was used. In addition, a roll coater was used for coating. In this example, a round rod coated with the aforementioned adhesive was...
manufacture example
[0496] Hydrated titanium dioxide obtained by hydrolyzing the titanyl sulfate aqueous solution was washed with pure water until the conductivity of the filtrate became 2200 μS / cm. NaOH was added to the hydrated titania slurry and washed until the adsorbed sulfate was 3 Calculated as 0.24%. Next, hydrochloric acid was added to the hydrated titanium dioxide slurry to adjust the pH of the slurry to 1.0 to obtain a titanium dioxide sol dispersion. NaOH was added to the titanium dioxide sol dispersion to adjust the pH of the dispersion to 6.0, and it was washed by decantation using pure water until the conductivity of the supernatant became 120 μS / cm.
[0497] 533 g (0.6 mol) of metatitanic acid with a water content of 91% obtained above was put into a SUS reaction container, blown with nitrogen gas and left to stand for 20 minutes to replace the reaction container with nitrogen. Add Sr(OH) 2 ·8H 2 O (purity 95.5%) 183.6g (0.66 mol), further add distilled water to prepare 0.3 mo...
Embodiment 1
[0554] (image forming equipment)
[0555] A printer LBP7700C manufactured by Canon was modified and images were output for evaluation. As a modification point, make the toner supply member of the developing device such as Figure 4 Counter-rotation is performed with the toner carrying member as shown, and voltage application to the toner supply member is turned off. In addition, the cleaning blade was removed, and the abutting pressure was adjusted so that the width of the abutting portion of the toner carrying member and the latent electrostatic image bearing member became 1.1 mm.
[0556] In addition, the charging roller was changed to the charging roller 1, and the peripheral speed ratio of the charging roller 1 with respect to the latent electrostatic image bearing member was modified to be 120%.
[0557] 100 g of toner 1 was filled in the thus modified developing device, and a developing device was fabricated using the toner carrying member 1 . The developed developing...
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